CN103828278B - Demultiplexing of a packet-based transport stream - Google Patents

Abstract

The invention relates to a device for demultiplexing a packet-based transport stream (14) of transport stream packets (12), which are each provided with a systematic forward error detection code, wherein the transport stream packets are each assigned to a data sink (20) of a plurality of data sinks (20), such that a data stream (36) of data packets (38) protected by means of a forward error detection code, which data stream is addressed to a particular data sink (20), is embedded into a useful data section of the transport stream packets that are assigned to the same data sink (20), wherein the device is designed to determine a probability value for each of the plurality of data sinks for a predetermined transport stream packet (12) that is erroneous according to the systematic forward error detection code, which probability value specifies the probability that the predetermined transport stream packet (12) is associated with the respective data sink (20), and to associate the predetermined transport stream packet to a selected data sink of the plurality of data sinks on the basis of the probability values for the plurality of data sinks.

Description

DeMux based on the transmitting stream of bag

Technical field

The present invention relates to a kind of DeMux be provided with the transport stream packet of system forward error-detecting code based on bag Transmitting stream, wherein, transport stream packet is each assigned to one in multiple data sinks.

Background technology

To be conventional practice in data stream to another data flow, and form the basis of such as osi layer model.Pass That send stream bag for example transmits one or several data flows based on the transmitting stream of bag, and the data flow transfers to include packet again, the number In payload data part according to the embedded transport stream packet of coating.For example, for DVB-H, MPE part and MPE-FEC parts quilt In the payload data part of embedded transport stream packet and IP coating again be embedded in MPE parts payload data part In.

Certainly, for each transmitting stream, a not only data flow can be transmitted.For each multiplexing, can be via One shares the several data flows of transmission streaming.Different receptor or data sink for example from different programs（Such as TV is saved Mesh or broadcast program）It is associated.When the packet of the different reception of multiplexing or data sink, by the embedded transmission of the latter In stream bag so that only comprising the part of in data flow in a transport stream packet, will each transport stream packet point One definite data sink of dispensing.In the inside of transport stream packet, indicate to data to connect in so-called transmitting stream header Receive the distribution of the transport stream packet of device.

However, if the FEC protections of current transport stream packet indicate that it is wrong, the demultiplexer in receiving side is not The data sink of receptor or addressing indicated by can trusting actually corresponds to the addressing of actual receptor or reality Data sink the fact.Therefore, the transport stream packet be dropped and do not provide it in data sink any one It is individual, to prevent from forwarding wrong data to data sink.

However, therefore the data sink for actually addressing lacks a portion of the data flow for being addressed to the data sink Point, this may result in high data degradation.If packet is embedded in the payload data part of transport stream packet, example Such as, by segmentation, when lost the transport stream packet for being addressed to respective data sink, not only can lose respective from being addressed to The part of the data flow of data sink, but also may lose one part be assigned in the transport stream packet of loss appoint What packet.For FEC protections with regard to data flow based on interleaver, lacking may be away from causing from the part of data flow Mistake fills the part of interleaver table so that have to abandon the whole of data flow in the interleaver table on respective data sink Part.

The content of the invention

It is an object of the invention to provide a kind of design for DeMux based on the data flow of bag, it causes to different The more effective data transfer of data sink.

This purpose is realized by the theme of appended independent Patent right requirement.

The present invention can be obtained to the more effective DeMux of transmitting stream based on bag based on following discovery, when for root It is that each in multiple data sinks determines general according to the wrong predetermined transport stream packet of the forward error detection code of its system Rate value, the indicating predetermined transmitting stream of the probit be surrounded by it is much may be assigned to respective data sink, to be based on many numbers According to the probit of receptor predetermined transport stream packet is distributed to selected in multiple data sinks one, such as its institute It is determined that most probable value data sink.

According to the embodiment of the present invention, it is addressed to the payload data part of the transport stream packet of respective data sink The most different characteristics respective probit that is used for determining for respective data sink.For example, it can be estimated that be addressed to each Redundancy from the packet of the data flow of data sink, as example for protecting the packet of the packet of respective data flow The forward error detection data of header or redundancy, the instruction of cross-layer address etc..Different field in packet is in longer period For respective data sink keeps constant and this condition to be used by any data sink.Such constant word Section is for example including address field etc..In addition, there is all the time identical value and therefore is may be utilized for being formed or determine Each there may be synchronization field in the packet of probit, such as because for the probability that different pieces of information receptor occurs is being passed Send Liu Bao two ends to have differently to change.All these indicates can be to carry for the final probit of respective data sink For contribution.For example, individually contribution is collected.

Description of the drawings

The other beneficial enforcement of embodiments of the present invention is subordinated to the Patent right requirement of subordinate.Below with reference to Accompanying drawing is illustrated in more detail to the preferred embodiment of the present invention, in accompanying drawing：

Fig. 1 is the block diagram for DeMux based on the device of the transmitting stream of bag according to an embodiment；

Fig. 2 is schematically shown according to embodiment close to the data flow for being addressed to tentation data receptor Based on bag transmitting stream exemplary setting schematic diagram；And

Fig. 3 is to schematically show and for illustrating determine associated data receiver according to embodiment The internal state of the probit determiner during hypothesis probit of device.

Specific embodiment

Fig. 1 shows the device for DeMux based on the transmitting stream of bag according to one embodiment of the present invention. In Fig. 1, the device is generally represented by 10.So as to device 10 is used for the transmitting stream 14 at the input 16 by device 10 Transport stream packet 12 is distributed to each including the multiple of decoder 21（18）Data sink 20, the decoder decoding distributes to its Data flow.

Such as later with reference to Fig. 2, using more specifically example, in greater detail, the transport stream packet 12 of input is provided with System forward error-detecting code and therefore, it is possible to determine whether respective transport stream packet 12 is wrong.For example, behind really Surely performed by the transmitting stream error detector 22 alternatively from the connection of the upstream of input 16 so that, if applicable, arrive Whether it is wrong up to the respective transport stream packet 12 of 12 informing device of transport stream packet 10 at the input 16 of device 10.Alternatively Ground, this determines the execution in device 10 itself.

Close to the input 16 for transmitting stream 14, therefore device 10 includes the outfan 24 of each data sink 20 simultaneously And internal 26, probit determiner 28 of demultiplexer or distributor and an allotter including each data sink 30.Distributor 26 is connected between input 16 and outfan 24.The task of distributor is to the data receiver being respectively allocated Transport stream packet 12 in device supply transmitting stream 14.For with regard to not having vicious transport stream packet 12, distributor 26 can be assembled to list Only data sink 20 for example from data stream packets 12 itself single transport stream packet distribution, such as transport stream packet report Scheduled field in head, as described by will use instantiation with reference to Fig. 2.Distributor 26 from transmitting stream 14 one by one Receive transport stream packet 12 and transmit in current transport stream packet, if it does not have mistake, be transferred to distributed data and connect Receive device 20.Other data sinks 20 do not receive this packet.

In this respect, distributor 26 includes being connected to the input of input 16 and for for the defeated of data sink 20 The respective outfan of each gone out in end 24.For each data sink 20, for the general of respective data sink 20 One input of rate value determiner 28 is also connected with the respective outfan of distributor 26 now, to receive in input by dividing Send out the transport stream packet 12 that device 26 is supplied to respective data sink 20.Letter it is to be noted, that according to interchangeable embodiment, when Hereinafter be used in greater detail some options for performing it is inapplicable when, can be between distributor 26 and probit determiner 28 Lack this connection.To again discuss in the ending of description.

When current transport stream packet 12 is wrong, then distributor 26 is always implemented as indicating such case to allotter 30, As indicated by by arrow 32.For this purpose, distributor 26 is coupled to allotter 30.As the sound to the instruction 32 Should, despite mistake, allotter 30 indicates that current transport stream packet 12 will distribute and be forwarded to which data connects to distributor 26 Device 20 is received, wherein, this is indicated by arrow 34.According to an embodiment, although hereinafter to illustrate institute in further detail There is measure, message 34 can be used as option response comprising actually to abandon current transport stream packet 12.

Connect as the data flow 36 with reference to the more detailed explanations of Fig. 2, packet 38 is embedded in distribution to identical data In the payload data part of the transport stream packet 12 for receiving device.Strictly speaking, it may be the case that distributor 26 is implemented as only to The payload data part of current transport stream packet 12 is forwarded to the data sink 20 or each probit determination being respectively allocated Device 28.Each transport stream packet 12 or its payload data part are forwarded to into correct receptor in distributor 26 or are correctly sought The data sink 20 of location and corresponding probit determiner ideally, in the input of module 20 or 28 below Place, it is complete to be addressed to the data flow 36 of respective data sink 20 for respective data sink 20.In such case Under, each data sink 20 or the decoder 21 being respectively allocated are possible to decode distributed data flow 36, with by this Mode obtains payload data 40, for example, from the video or voice data etc. of the payload data part of packet 38.

The probit determiner 28 for each data sink 20 is where there is, to indicate for distributor 26（32）Have The current transport stream packet 12 of defect, based on the information of the payload data part of predetermined transport stream packet 12, it is determined that indicating real The transport stream packet 12 on border to the probit of respective data sink 20, for example, is directed to for this purpose and is divided with what probability assignments Orchestration 30 is forwarded to probit determiner 28 from distributor 26.It is multiple with what is illustrated in greater detail below in order to determine probit Different options.As shown in FIG. 1, each probit determiner 28 can be divided into two parts, i.e., for engagement so far Till be forwarded to respective data sink 20 transport stream packet 12 payload data part protocol data update section 42, with And assume determine the probability portion 44, wherein this style of segment what is be merely exemplary.

For each data sink 20, allotter 30 is from the probability of acceptance value of respective probit determiner 28 and is based on this A little probits determine distributes to which data sink 20 by current transport stream packet 12, or according to an embodiment, such as Fruit is not distributed, then probit is nonsensical.Allotter 30 is implemented as distributing to current transport stream packet 12 The maximum data sink 20 of probit.

Such as it is described in more detail below, probit determiner 28 is implemented as determining that probit is based on multiple lists One probit, such as by the way that the latter is added, wherein, those single probits are for example always used for relative to should be determined It is the payload data of the current transport stream packet 12 of the content of current transport stream packet on the respective position with high probability The measurement of partial similarity, if it is assumed that current transport stream packet represents completely prolonging for the data flow 36 of respective data sink 20 Continuous receiving portion（That is, in the previous transport stream packet of respective data sink is not lost）, or it is distributing to Each the corresponding or random partial of the payload data part of the transport stream packet 12 of data sink sentences high probability presence, Independently of the currently processed transport stream packet for distributing to respective data sink which transport stream packet the fact.As described above, The process will become more apparent upon according to following explanation.

With reference to Fig. 2, it is described now for the embodiment of the possible setting of transport stream packet 12 and packet 38.Pin Setting to packet 38, it should be noted that as described by referring now to Fig. 2, identical mode can be utilized in all of data Receptor 20, or the setting for data sink 20 can be different, i.e., some data receivers as seen with reference to fig. 2 Can be with identical and different for other data sinks for device 20.

The exemplary of the transmitting stream 14 with transport stream packet 12a and back to back transport stream packet 12b is shown in Fig. 2 bottoms Part.In this part of Fig. 2, it can be said that showing transport layer 46.As shown in FIG. 2, each transport stream packet 12a and 12b includes transport stream packet header 50, such as close to payload data part 48.In addition, each transport stream packet 12a, 12b comprises additionally in the forward error detection code 52 of system, i.e., can detect respective transmitting stream by the forward error detection of system Wrong redundant data 52 in bag 12a or 12b.If be suitable for, data 52 are further able to carry out forward error correction.Redundancy Data 52 for example fully or only for header 50 or or even just for identification can indicate 54 protecting transport stream packet 12a or 12b. For example, field or identification indicates that 54 are located in transport stream packet header 50, and the field or identification indicate the respective transport stream packet of 54 identifications 12a or 12b distribute to its data sink 20.In fig. 2 it is illustratively assumed that transport stream packet 12a and transport stream packet 12b point It is furnished with different data sinks.

In fig. 2, also it is illustratively assumed that for data sink 20, to it transport stream packet 12a and 12b, addressing are distributed Data flow 36 to the data sink 20 is by the embedded respective transport stream packet for distributing to respective data sink 20 of segmentation In the payload data part 48 of 12a, 12b.The starting point of in the packet of embedded data flow falls into therein every Therefore individual transport stream packet includes rising for the initial packet 62 in respective transport stream packet 12a of the instruction in transport stream packet header 50 Pointer information 56 of the point positioned at where the payload data part 48 of respective transport stream packet.The data sink The end part 64 of the previous packet of data flow is located in the remainder of payload data part 48, and the end part is still not In one of previous transport stream packet positioned at respective data sink.For Fig. 2, illustrate for transport stream packet 12a Starting point 60 is fallen in payload data part 48.It is exemplarily illustrated with reference to the transport stream packet in Fig. 2, but can also has Such probability, transport stream packet does not include the pointer information 56 in transport stream packet header 50, because for example to its distribution transmission The starting point of the packet of the data sink of stream bag 12b is consistent with the starting point of payload data part 48, or because effectively The content of load data part 48 corresponds to the continuity of the current data packet of the scope beyond payload data part 48, so And, until the end of payload data part 48.Need exist for briefly, it is noted that in payload data part 48, Strictly speaking, in addition to the payload data of packet, can also there is filler or filling information, such as when addition refers to When pin information 56 causes current data packet to terminate exactly at the end of payload data part 48 so that data below Bag starting point and can not possibly lack pointer information 56 in the currently active load data part, then will cause in payload Free space is yet suffered from the end of data division 48.The latter at least when such as transport stream packet 12a and 12b have predetermined length or May only be suitable in the length that the predetermined quantitative stage is configured.Quantization stage can be with the instruction in transport stream packet header 50 Or indicated with different more irregular load modes.

The embodiment of Fig. 2 thus show the starting point of in the packet 38 of the distribution of data sink 20 of distribution 60 do not fall within transport stream packet 12b therein does not include pointer information so that starting point 60 does not fall within the effective of transport stream packet therein Load data part 48 compared with the payload data part 48 that this starting point 60 falls into transport stream packet 12a therein, Ke Yitong Cross and lack or omit pointer information, i.e., increased by the length of field instruction 56.In other words, the transmission of transport stream packet 12b Stream packet head 50 can be less by the length of pointer information 56 compared with transport stream packet header 50, and therefore and transport stream packet Compare the payload data part 48 that can increase transport stream packet 12b in the payload data part 48 of 12a.Each transmitting stream Bag 12a, the mark 66 in the transport stream packet header 50 of 12b can indicate to believe with the presence or absence of pointer in respective transport stream packet header 50 Breath 56.

In fig. 2, indicate such as to distribute the data flow 36 of data stream packets 12a to it on slightly above transmission layer plane 46 Control plane 68.In fig. 2, schematically illustrate with four follow-up packets 38_a-dPart.Exemplarily, data Bag 38b is that its starting point 60 is fallen in the payload data part 48 of transport stream packet 12a and its Part I is thus corresponding to this The packet of the part 62 in the payload data part 48 of transport stream packet 12a.The following part 70 of packet 38b can lead to Cross and be embedded in write the following transport stream packet being associated with the data sink according to segmentation, wherein if fruit part 70 is not very Long, then pointer information can be again directed to the starting point of the data below bag 38c in the payload data part.

What is be briefly mentioned is, although advise packet 38 in the description of Fig. 2 at present_a-38_dCommon sequence can be belonging to Coordination data bag, but other packet is spreadable to difference in functionality, and the forward direction of the system of such as other packets is wrong Miss the packet 38 of the transmission of protected code_a-dStream in.Thus, for example, packet 38_a-38_dCan be that MPE-FEC parts spread Arrive MPE parts therebetween.For part 70, this might mean that it is not included in distributing to respective data sink and then Transport stream packet in, and be contained only in next one or even more behind transport stream packet in.

As shown in FIG. 2, packet 38 is again illustrated_a-dIn each can include respective payload data Part 72 and packet header 74.In addition, each packet 38_a-dSystem mistake protected code can also be included, its with including header 74 and the respective data word 38 of payload data part 72_a-dSystem forward mistake code word is formed together, but for clearly former Cause, in fig. 2 not shown this probability.However, showing that for example each packet header 74 can include redundant data portion Points 76, header 74 forms the system forward mistake code word for error detection and/or error correction by it, wherein header 74 Nubbin 78 includes the corresponding forward error detection/correction relation for the redundant data portion 76.

With transport stream packet 12a, 12b is conversely, the packet 38 of Fig. 2_a-dExemplarily include variable-length and in order to indicate The length, such as including each packet 38 of instruction_a-dLength packet header in Length Indication 80.

In addition, packet header 74 is for example including the data sink uniquely indicated to its distribution data flow 36 or for example extremely Its address field 82 is assigned exclusively to less.Uniqueness can be with the address in the packet of the data flow of other data sinks Indicate related.There may be another field 84 in packet header 74 for example to include for synchronous etc. all packets Unified value, or for all packets of same type, such as on the one hand for MPE parts on the other hand for MPE At least identical value for bag.

Another data flow 86 that even more high protocol level or plane 88 are further illustrated in Fig. 2 can be with embedding data bag 38_a-dPayload data part 72 in, the wherein embedded packet 90 that the data flow is exemplarily provided, such as not In the case of segmentation, packet 38 is respectively embedded into_a-dPayload data part 72 in, such as in fig. 2 with dotted line exemplarily Illustrate.Thus packet 90 can also include variable-length.Just as the packet of relatively low protocol layer 68, they respectively can be with Including payload data part 92 and header 94, and the length for indicating each to wrap 90 can be for example included in header 94 Length Indication 96.In addition, in each bag 94, further exemplarily there may be address field 98, its instruction is addressed Data sink is uniquely coupled with the addressing data sink of data flow 36.

Describing to arrange transport stream packet with reference to Fig. 2 and the data flow of the data sink 20 in Fig. 1 is being embedded in into the transmission After probability in stream bag, it should be noted that the probability of Fig. 2 only represents the exemplary probability in big probability certainly, The embodiment of Fig. 1 is hereby incorporated by being useful, to prevent abandoning wrong transport stream packet, such as hereinafter with reference to Fig. 1 and Fig. 2 is described.In the embodiment of Fig. 2, for example, data flow 36 can be MPE data flows and data flow 86 can be IP traffic.As already mentioned, packet 38_a-dPreferably shielded forward error protected code, wherein forward error are protected In the packet of the data flow 36 that shield code can be positioned at, in particular this mesh is arranged.For this reason, in Fig. 2 forward direction is wrong Error code is only exemplarily represented with 100.As already mentioned, forward error protected code 100 can be based on interleaver function System forward error protection code, forward error protected code 100 protects accordingly the packet 38 in arrangement_a-dPayload data Part 72, the order for occurring with them in this arrangement is input into payload data part 72 in interleaver table（Such as with Row）On the one hand, such as to form the system forward mistake code word consistent with the row of the interleaver table, on the other hand forming FEC The each several part of data 100.In fig. 2, this illustrates that wherein interleaver table 104 has continuous data bag 38 on 102_a-38_dCompany The often row 106 of continuous payload data part a-e forms a system forward mistake code word, illustrated therein is and interweaves by row insertion Device table 104 and redundant data 100 is laterally added in interleaver table 104.

Referring again to Fig. 1, it is become clear that by comparing Fig. 1 and Fig. 2, and each probit determiner 28 has determination For many different probability of the respective probit of respective receptor 20, wherein the concrete reality of this respect is described below Example.As having pointed out already above, individually contribution can be then independent by these with probit contribution as result for all these Contribution be added to obtain the respective final probit for respective data sink 20, then each final probit It is used in allotter 30 determine final selected data sink together with other probits of other data sinks 20 And inform 34 distributors 26 thereon.

For example, in the probit determiner 28 for each data sink 20, as transport stream packet 12 reaches probability The input of value determiner 28, with invariable for all of data sink 20 or for respective data sink 20 Invariable mode or according to the transport stream packet 12 for being previously already allocated to respective data sink 20 positioning current transmission The Part I of stream bag 12.Part I for example may refer to pin information 56.If pointer information 56 is always disposed in transmission Same position in stream bag 12 or transport stream packet header 50, then all of data sink 20 in probit determiner 28 Positioning is identical.Can also be alternatively such situation, for different data sinks 20, transmitting stream for some purposes Packet head 50 is different, and therefore for each data sink 20, the pointer information in the transport stream packet 12 of distribution 56 position is identical, but for being different for the transport stream packet 12 for distributing to other data sinks 20.Then, each probability Value determiner 28 will go to but different from the pointer information 56 at the constant position of other probit determiners 28 or first Point.Distributing to the structure of the header 50 of the transport stream packet 12 of respective data sink 20 can certainly be derived from being previously allocated to The transport stream packet 12 of the respective data sink 20 in determiner 28.Once this thing happens, probit determiner 28 is for example According to the content of predetermined transport stream packet 12 in Part I（I.e. 56）To position the Part II 62 of current transport stream packet 12, i.e. The content of the predetermined transport stream packet 12 in just as Part I 56 is actually pointer information 56.In transport stream packet 12b, The hypothesis being clearly wrong as indicated by 56 '.If the content of the part 56 ' of transport stream packet 12b is used as pointer information, Then the part 62 ' of such as payload data part 48 is positioned as Part II.Each probit determiner 28 is analyzed now Part II 62 or 62 ' whether can be allocated to respective data sink 20 packet 38 starting point.For this purpose, Data sink can for example assess address field 82 or address field 98.That is, should be disposed in respective field 82 or 98 Part 62 or 62 ' in position on, if it is the starting point of the packet for being addressed to respective data sink 20, each probability Value determiner 28 can be by disclosure and those parts otherwise in the packet 38 or 90 of respective data sink More typical content is compared for those fields.As a result the respective probability for respective data sink 20 will be introduced into In value and allotter 30 based on this execution distribution corresponding probability contribution.For example, it is desirable to content and reality content The measurement of similarity is used as contribution margin, wherein weigh can particularly simple implement, i.e., binary ground so that if they Then contribution is not zero for matching, is zero if mismatching.

Can be such situation after paragraph above, each probit determiner 28 simply checks second Whether the first field 82 or 98 divided in 62 corresponds to more or less invariable information for respective data sink, Such as at least pass through distributor 26 certainly or allotter 30 finally distributes transport stream packet 12 to respective data sink 20.May be used also To be such situation, probit determiner 28 checks whether two fields in Part II 62 include predetermined relationship, because It is applied in packet 38_a-dHeader 74 in field 78 and 76 between.Perhaps, the matching or corresponding relation are not for current The independent instruction of the data sink of transport stream packet to the distribution of respective data sink 20, but if can include and number Content is found in part 62 according to the similarity of receptor specific information, then the probit determiner 28 can be using mentioned above Inspection come increase probability contribution because potential field 82, the corresponding relation mentioned above in 98 is not only a kind of coincidence It is true, it is assumed that this is at least packet 38_a-dStarting point, with addressing data sink it is unrelated.Similarly, the probability contribution margin The final probit for respective data sink 20 mentioned above can be used to sue for peace.

Described herein, probit determiner 28 checks whether the first field 110 of part 62 is to allow addressing each From the content of the field 82 or 98 of the instruction of data sink, and check whether two other fields 112 and 114 combine report 74 field 78 and 76 or including system forward error-detecting code relation relative to each other.

Additionally or alternatively, determiner 28 can be checked with regard to whether the 4th and the 5th field has relative to each other Predetermined relationship, the predetermined relationship be applied to redundancy instruction, i.e., whether these fields 116,118 for example relative to each other as word Section 98, as 82, the two fields address in some way data sink 20.Additionally, this connection or context may not be The specific data of receptor, if but data sink is special for the paired each data sink of such as other change of field 110 The great field of fixed probability, can be determined device 28 for for example increasing probit, as described above.

Up to the present do not account for being described the possible inspection option of determiner 28, due to observing so far From the packet 38 that the transport stream packet of the distribution of respective data sink 20 is obtained, each determiner 28 is directed to respective data receiver The content of next transport stream packet of device 20 also has certain expectation.Therefore for example can be such situation, each determiner 28, pin Data sink 20 to most backward its distribution transport stream packet 12, according to Length Indication 80, positions having for current transport stream packet 12 Imitate the part 120 when load data part 48 starts and analyse whether the still incomplete number that can be respective data sink According to the continuity of bag, the packet 38 for distributing to respective data sink 20 is located in the data sink, with length 80, therefrom Find out scope of the packet beyond the transport stream packet for finally distributing to respective data sink 20.For example, in each data Bag 38_a-dEnd, can include the mark of the end for indicating each packet, and the correspondence position of the end of part 120 with so EOF mark comparison can obtain respective data sink final probit further probability contribution margin.However, also Can be such situation, the part of packet is located in part 120, and it includes the specific information of data sink, such as field One in 82 or 98.Similarly, for these fields, similarity can be carried out and is explained to determine further contribution margin.

Adopt to obtain the previously described reality of the possibility inspection of corresponding probability contribution margin according to device 28 can be determined Example, determiner 28 each positions some fields using some hypothesis, and some assume again be derived from or can not be derived from The information of the transport stream packet being previously assigned.If corresponding relation or matching are drawn by these inspections, respective data receiver The probability of device is certainly of a relatively high, and current transport stream packet 12 belongs to the data sink 20, because the corresponding relation is not current Any position of transport stream packet but determine in certain position.Additionally or alternatively, can be such situation, each is general Rate value determiner 28 also checks for the random field in current transport stream packet 12 and sees whether its content is corresponded to respective data receiver Invariable information for device 20, such as at least from by transport stream packet 12 finally distribution.Data sink 20 is led by losing Whether the starting point that the packet with regard to being oriented to it can be lost to its transport stream packet can be with potential positioned at current transport stream packet In overview, an and random position that for example may be located in current transport stream packet in field 98 or 82.Additionally, The transport stream packet being previously assigned can be verified or not prove defective but still to distribute to current data reception device Transport stream packet, therefore for example remain respective data sink complete data packet Length Indication 80 may it is defective and The field 98 and 82 of follow-up data bag may be located at unexpected diverse location.If it is determined that in the typical case of value 82 and/or 98 The similarity of appearance, certainly, the probability contribution margin of the final probit of thus obtained respective data sink 20 is preferably smaller than worked as The above-mentioned inspection of some intended orientation positions of front transport stream packet.

It is similar with what is described above with reference to location field, such as additionally or equally alternatively, in random site inspection Whether other field is to reservation system forward error protected code relation each other or suitable for the He of control plane 68 The relation that redundancy in 88 header is indicated.However, it is also possible to be such situation, inspection below is performed in position location, That is, the position of field is drawn according to the similarity here with data sink specific information, because it is for field 82 or 98 It is typical so that will not randomly generate the probability of the similarity of the random field of random site increases.

Further, it is determined that device 28 may be implemented as the Length Indication 80 using usual packet 38 and pointer information 56 it is related the fact that.Reason for that is, for example, data flow 36 in Fig. 2 data sink 20 related to this is really Device 28 is determined according to Length Indication 80 and packet 38_aThe part 64 for not yet receiving size, it can be assumed that next to expect The pointer information 56 of transport stream packet include that there is high probability across the pointer information 56 of the size of the part 64, it is such as same In fig. 2 by indicated by arrow 58.The field 56 of current transport stream packet and last received respective data sink Each comparing for the Length Indication 80 of packet can be therefore by such packet 38 thereon_aWhat is be not yet received entirely The corresponding determiner 28 of data sink is used for determining probability contribution margin again.

Can with it is often the case that, the transport stream packet being associated with respective data sink 20 is comprising mutually the same Or at least including the transport stream packet of identical content.Can be example when certain data carousel is transmitted for respective data sink Such as such case.The identical content for being interrupted the transport stream packet 12 of reproduction in the transport stream packet of these data sinks for example can be with It is relevant with the signaling table of this data carousel.Determiner 28 may be implemented as the respective data sink belonging to determiner, It is determined that the identical content that the interruption among distributing to the transport stream packet 12 of respective data sink in advance reproduces, then, and The content and interruption for being implemented as the payload data part by relatively more current transport stream packet 12 reproduces identical content come really The probit of fixed respective data sink.

It is often assumed that data flow 36 is for data flow determined by data sink in description previously.This is substantially Be it is correct, certainly but be equally correctly that data flow 86 is the number for being addressed to data sink 20 in the embodiment of Fig. 2 According to stream.With the encapsulation of data of the encapsulating structure for being divided into the transport stream packet 12 for distributing to respective data sink 20, i.e. header number According to 74 together, only it is encapsulated in encapsulating structure, that is, in being encapsulated into layer 68.Determiner 28 now can be for currently true for its setting The respective data sink 20 of device 28 is determined, it is determined that the several potential sites in current transport stream packet 12, the such as He of above-mentioned position 116 118, the encapsulation of data 74 including predetermined relationship on the one hand relative to each other and on the other hand it is addressed to respective data wherein In the current transport stream packet 12 of the content of the packet 90 of the data flow 86 of receptor 20, based in predetermined several potential sites The fact that whether there is predetermined relationship between the content of 116,118 current transport stream packet 12 is determining probit or respective data The corresponding probability contribution margin of the final probit of receptor 20.

The probability for just having referred to only is located in transport stream packet in desired potential site and is not located at follow-up transmission certainly Just exist when in stream bag.For example can be such situation, determiner additionally or alternatively determines and is addressed to respective data The content of the packet of the data flow of receptor 20 may be located at one or several potential in current transport stream packet 12 therein Position, it includes and the encapsulation of data in the transport stream packet 12 for distributing to respective data sink 20 in advance The predetermined relationship of content, and distributed to based on the predetermined transport stream packet in one or several potential sites and in advance respective number According to the fact that whether there is each relation between the content of the transport stream packet 12 of receptor determining probit.Therefore for example can be Such situation, for not exclusively receiving current data packet 38_aData sink, field 82 already belongs to the packet 38_a's Received part, wherein the field 98 of the packet 90 being embedded is located at the biography of still desired respective data sink In sending stream bag, here it is why in this case, the determiner 28 in current transport stream packet compares corresponding with field 98 The content of its position and field 82 is to obtain（Further）The reason for probability contribution margin.

It is further noted that probability contribution margin mentioned above can also by different way be combined and can not To be combined by summation.For example, these values can be multiplied each other.Can also there is the mixing of these combinatory possibilities.

Other condition can be used for determining other probability contribution margin by determiner 28, i.e. under normal circumstances, be addressed to The data flow of different pieces of information receptor 20 is multiplexed into the transport stream packet 12 of transmitting stream 14, i.e., for respective data sink The time change of the transport stream packet 12 of the arranged in series of 20 distribution transmitting streams 14 will not occur at random, but according to preassigned pattern, Such as occurred according to certain speed/quality optimization method so that be addressed to the transport stream packet of certain data sink generally with pre- Timing inter mode is occurred in transmitting stream 14.So, determiner 28 may be implemented as it is determined that respective data sink 20 During probit, it is considered to the relatively short-term and/longer-term dividing frequency of the past transport stream packet 12 of respective data sink 20.

The effect of above-mentioned measure now is to determine device 28 and provides for each data sink 20 so that it is for allotter 30 For obvious probit, current failure transport stream packet 12 currently belongs to the data sink 20.Thus there is no need to abandon and work as Front transport stream packet 12, but address indicates that 54 can be considered as insecure.

Receive its transport stream packet 12（Despite mistake）Respective data sink 20 can be by using forward error , effectively using the transport stream packet or correspondence payload data therein, the forward error protected code 100 is for example for protected code 100 It is system forward error protection code.If the forward error protected code 100 in data flow 36 is the system with interleaver function Forward error protected code, then due to the transport stream packet distributed, respective data sink or its decoder 21 can completely with compared with High probability fills in interleaver table 104 so that decode respective data sink by the decoder 21 of respective data sink 20 Data flow 38 at 20 is successful under high probability, because error correction eliminates failure or the mistake in wrong transport stream packet By mistake.

Described embodiment is seen figures.1.and.2 above-mentioned again hereinafter in different enforcement with reference to concrete Data form illustrate before, below referring again to Fig. 3, test for describing probit computer 28 from slightly different visual angle Feature.In figure 3, current transport stream packet illustrates by 12 ', such as to its function also represent other probit computers with The example probability value computer that above slightly different mode is discussed is presenting.Fig. 3 shows transport stream packet 12 ' by band Probability when the presentation of allotter 30 for being designated as the problem whether wrong transport stream packet 12 ' belongs to associated data receptor 20 The state of value computer.Now, probit computer 28 has certain state, and wherein it is distinguished itself and temporarily can quickly change Certain data 200 for becoming.The state is that data sink is special, such as can be drawn from following discussion；Only processing data, specific Data can be just that data sink is unspecific.

Such as 200a, 200b among data, it is all that data sink is non-dedicated, is such as used for field 84（Fig. 2） Content representative value, be also respective data sink it is special or or even it is unique, such as example can correspond to for respective The content 82 or 98 of Fig. 2 of data sink and constant data 200c and 200d are kept on mass data bag 90 or 38, Furthermore and desired data 200e of some fields and 200f of transport stream packet 12 ', if transport stream packet 12 ' is payload number According to the transport stream packet in part with the respective data sink for expecting content, such as there is last received data sink still The transport stream packet of the respective data sink of the holiday of unfinished packet, the bag 38 in such as Fig. 2_a, i.e., in data flow In the content that no longer occurs because they are more or less only applicable to certain following packet, it can be said that from packet It is changed into another packet and is therefore applied to the free of losses of the aforementioned data bag of respective data sink.For finally referring to Situation, data 200e and 200f for example can be the expectation contents of the directional information in the header of transport stream packet 12 '.In data Receptor exclusive data 200a, among 200b, may have in payload data part 48 and not include but include in header 50 Data, such as identifier 54, the situation as can be itself wraps 12 ' different piece existing defects and actual identification Symbol content 54 is equal with the desired content of respective data sink 20 to cause involved bag 12 ' to belong to the data sink 20 probability increases.

For each data 200a-200f, probability of happening distribution 202 can be distributed, for per data 200a in such as Fig. 3 As shown in exemplary.Probability of happening distribution 202 indicates to expect per data 200a with which type of probability along current transmission Length L of stream bag 12 ' is present on all possible position.Probability of happening distribution 202 is directed to for every data, such as and includes pointer Can not change for the part of the interior time-varying state for perhaps also illustrating that probit computer 28 of the expectation of information 56.Data Receptor exclusive data 200a and 200b for example may only be located in payload data part 48, as is it well known, and then The probability of happening distribution 202 of this data 200a is only not in the possibility expanded range 204 of payload data part 48 Equal zero.The increase peak value 206 of probability of happening distributed process 202 is such as based on according to the current state of probit computer 28 The Length Indication 80 of the last packet for only receiving by bar draws from desired leap information 200e, and wherein the Length Indication is for example Also illustrate that a data 200.For such as to being related to the data 200 of the expectation content of header 50, there can also be constant generation Probability distribution.It is, for example, therebetween leap information 56 or the information not yet submitted in advance that may be present, however, such as distributing to certain Sequence number in the header of the transport stream packet of individual data sink.This sequence number is represented in the way of specific to data sink from distribution It is changed into the transmission of another transport stream packet for distributing to respective data sink to a transport stream packet of respective data sink The information of stream bag.

According to probability of happening distributed process 202, probit computer 28 can determine the interior of current transport stream packet 12 ' now Hold and transport stream packet 12 ' in all positions or only there is similarity between the data 200 of specific position.For different or All of data 200, all or several or position that Similarity value is thus directed towards in current transport stream packet 12 ' produces, its In in figure 3, exemplarily, similarity is illustrated as the continuous process in transport stream packet 12 '.It is determined that certain position of similarity The product of the Similarity value with correspondence probability of happening value is used as above-mentioned probability contribution margin now.For number as much as possible Such case is performed according to 200, as described above, and and then these contribution margins can be added or are multiplied, i.e., These contributions are further weighted or is not processed.

By every sub-distribution transport stream packet, in spite of faulty, probit determiner 28 all update its data 200 and its State and the probability of happening distribution for belonging to the state.

More broadly, for each data sink 20, when the bag is distributed to into data sink, there is general Rate value determiner 28 and the probit determiner 28 have respectively the independent data receiver of the content update by transport stream packet Device single user state.The state of different probability value computer 28 is thus different from each other.Because these states have been used, by comparing this State determines how it belongs to the probability of inherent data receptor 20 with the content of current problematic wrong transport stream packet 12 ', The of different sizes and allotter 20 of the probit of determiner 28 can select the data receiver with provided maximum probability Device, this has equally exceeded certain minimum threshold relative to other probits or with absolute mode.

With reference to Fig. 3, it is noted that, the calculating of peak value 206 or its position for example corresponds to location field position, such as previously Mentioned in description.The search or positioning can based on pointer information 56 by update or predict new data packets by starting point in Which position of one of following transport stream packet and occur.Here it is described above.The similarity inspection of position location can be with Calculating corresponding to the storehouse of the corresponding cross-correlation function with the corresponding deviation post for expecting content is having corresponding to one side The transport stream packet 12 ' of defect and on the other hand another similarity measurement of the local location between desired content.

In other words, above-mentioned embodiment is illustrated again in the context of concrete broadcasting method.Here, above-mentioned embodiment party Formula shows the data flow towards bag of the fault-tolerant decoding of encapsulation of data stream or the encapsulation with differentiable data sink The probability of method of reseptance.Although although or damaged encapsulating structure, be still to be enabled to here to each data sink point Bag with garbled-reception.Above-mentioned embodiment realize can with but not exclusively support to be directly related to and adjacent protocol layer rank Gradual layering error protection method.

As method for packing, for example, multi-protocol encapsulation can be mentioned（MPE）With general flow encapsulation（GSE）, it for example can be with For broadcasting method DVB-H and DVB-SH.

As described above, the relevant heuristic forecast model of the packet of constituting portion misclassification misfeed can be used for receptor Allocation of packets on side gives one of several possible data sinks further to be decoded.Here, as described above, can With using the different discoveries about receiving bag：The well-known priori due to selected transmission standard, measures in transmission During invariable or continuous predictable bag parameter.

It is as shown in Figure 1, collect and predict these parameters for each data sink of the prior bag for receiving.For Each bag for further receiving, based on these discoveries, for each data sink hypothesis probability can be calculated, and the calculating is by upper State probit computer 28 to perform.Then the bag 12 of damage can be distributed to the data sink that probability is assumed with highest 20.Can prevent from receiving to damage very serious bag using lower limit.

The realization of above-mentioned embodiment only refers only to extend the known transfer approach on receiver-side.It is inaccurate in this respect The standby compatibility with receptor is kept intact.In other words, it is not necessary that perform change by standard.Similarly, it is not necessary that Modification is performed on transmission side.

In other words, the recipient of the encapsulation of data stream of the rank of extension transmission and transport layer is above embodiments described Method.It is encapsulation network bag from the situation of the application program of the field.By corresponding method, encapsulated data packet 90 is subsequently split Into support bag 12.Generally, in system multi-channel multiplex process, several payload data streams encapsulate parallel transmission, transmission bag 12 It is provided with the mark for assigning them to data flow.

In the case of faultless, which payload data the receptor of this data flow is determined to based on the mark 54 The transmission bag that stream distribution is received.If garbled-reception at least damages identification field, the transmission bag that must be abandoned into.May Be, it is also necessary to abandon it is following it is several bag till agreement can again make payload data stream synchronization.Generally, These situations can cause the loss of payload data bigger.

The frame complete of transmission bag 12 in itself distributes to be formed using the prerequisite of said method.With fixed packet length Priority is generally given in Transmission system.The view on protocol layer for being related to is further prerequisite.Therefore, above-mentioned side Method is a part for cross-layer optimizing.

Using said method, additionally now, the transmission bag 12 of garbled-reception is distributed to into each payload data and is connect Receive device 20.Thus prevent using several parallel data flows, receptor 20 is unexpected to be received actually to be not for what it determined Data, therefore operated based on wrong data and corrected.

In this respect, extract and write or mark the parameter of the payload data bag for distributing（Referring to Fig. 3）.The renewal point Do not occur in each data sink.Here, these parameters are interested, and these parameters are from order and time context Include high configuration or strong predictability in advance.For example this is parameter, and its each value is in a standard firm predetermined.All parameters are all It is invariable during transmitting with strong predictability, or carries out successive value change.Hereinafter list again and select this The example of a little parameters.

Make the bag 12 of garbled-reception related to data sink 20 with the help of so-called hypothesis probability.By receptor Or associated computer 28 calculates probability from the amount of the Weighted Rule that probability is assumed for formation.These rules are used for data The corresponding parameter of the unappropriated bag 12 of the current more Buddhist monk of new state 200 of receptor 20.Rule here with have been mentioned above Parameter have substantial connection；Provide example again when listing.Processed to consider by the averaging processed including weighting Regular, the unallocated bag that can be directed to each data sink calculates hypothesis probability.The probability optionally can directly in extension It is used for being made decision using the formation of maximum in demultiplexer or in allotter 30.Alternatively, floating mean value Or the formation of similar wave filter can be connected to upstream.Extension demultiplexer has following feature：Error differentiating is received Transmission bag 12 situation, and subsequently the bag in all receptors 20 is estimated in this case.Then this is tied Fruit sends into the decision-making as an alternative of current demultiplexer.

It is therein to assume the current state that probability depends on data sink 20.Rule itself some is complicated. These rules start the search procedure in transport stream packet 12 to be analyzed and are indicating the higher bag for restarting moving point of definitiveness The parameter 200 of renewal is adjusted in the case of interior successful search some models.It is here the higher association in data flow to restart moving point The meaningful and verifiable pattern of view layer 88 or 68.In addition, also there is simple rule, it is to expecting certain that position occurs A little values are analyzed and directly provide assessment.According to the current state of receptor, activate or disable for optimizing amount of calculation Independent rules.

Demultiplexer is for mistake（During reception）Change method it is as follows：For unappropriated bag 12, it is assumed that probability Formed using each data sink 20.The bag is subsequently allocated to assume the data sink 20 of probability with highest.In addition, such as It is upper described, the filtration to value may occur in advance.Data sink 20 itself is further according to garbled-reception processing bag；Send out The method of raw error checking or correction here is belonging to the decoder 21 of receptor and uses, for example to use under conditions Bag is corrected so that future uses to it.

In addition, the lower threshold for receiving bag prevents from receiving by receiving the data produced by strong interference bag transmission. When all receptors all calculate the relatively low acceptance value of this bag, this condition is detected.Then these bags are finally abandoned.

In the above-mentioned methods, cooperative effect combines presence with forward error guard method.Said method can use from The receiving data of multiplexing so as to further with the additional forward error protection method existed according to standard enter advance The process of one step.By the distribution to each receptor 20, the error protection of respective receptor 20 still can pass through special side Formula is receiving the data block of potential damage.Therefore, the correction probability of respective error protection increases.

Hereinafter, detailed description is given using the example of the DVB-H standards with MPE.Using based on broadcast IP data broadcasting method DVB-H, it is possible to use said method.Here, using multi-protocol encapsulation（MPE）Receive IP bags 40. In MPEG-2 transmitting streams 14, by its specific data distribution to single transport stream packet 12.Will transmission in the case of faultless Stream bag is addressed to MPEG receptors 20 and passes through so-called " PID Packet Identifier " according to standard（PID）To carry out, referring to 56.

By said method, also the transport stream packet 12 ' of garbled-reception is distributed to into single data sink 20.In Fig. 1 In, show associated setting.Each data sink 20 and its computer 28 manage belong to transmitting stream here, i.e., described The parameter current of the part of the inlet flow of the bag of receptor 20.Extension transmitting stream demultiplexer 10 so that set using having The TEI marks put（Error indicator）Transport stream packet 12, i.e., in the case where mistake is detected by module 22, using root According to the selection standard of new method：Each data sink 20 or its computer are in terms of it assumes probability for transport stream packet by matter Doubt.Bag is sent to the receptor 20 with highest return value.Cannot the data sink 20 of decoding error bag receiving it After abandon.However, exclusive data receptor can also be further processed to erroneous packets.

DVB-H it is above-mentioned in the case of, the new method according to Fig. 1 to Fig. 3 can support forward error correction MPE- FEC（Multi-protocol encapsulation forward error correction）.The method is therefore, it is possible to using the several synchronous MPE implemented with error protection Data flow 36 truly being changed, the enforcement with a standard（I.e. in for example gradual and layered approach）There is provided more Positive correction.

The each Self management of MPE-FEC data sinks 20 passes through error protection bag code RS（255,191,64）To cache for school The so-called MPE-FEC frames of positive data（Referring to 100）.When the above-mentioned process of defect bag 12 ' and MPE-FEC forward errors are protected When shield is combined, the data structure for storing packet stream parameter may be located at and a similar position in MPE-FEC frames Put, and if be suitable for, then in same protocol example.

Above-mentioned embodiment may be directly applied to but be not specifically applied to as have broadcast standard DVB-SH MPE and MPE-IFEC（Inter-burst FEC）Other and non-exclusive method for packing（Digital Video Broadcasting Project(DVB)(editor):Digital Video Broadcasting(DVB);MPE-IFEG.Digital Video Broadcasting Project(DVB),112008.(DVB Bluebook A131).http://www.dvb.org/）, such as The corresponding method of other broadcast standards of ATSC（Standard ATSC A/53,Part1:82009.ATSC Digital Television Standard:Part1Digital Television System.http://www.atsc.Org/）And its He etc..

Although having been presented for many examples, hereinafter it is used to be formed the rule for assuming probability by again clearly List.

In the following, it is described that to updating significant different parameters and bag being distributed to into data sink using parameter The rule of correspondence.Strictly all rules can be formed by weighting to be assumed probability to be used together.When receptor inside detection synchronicity During loss, the search specification of these rules is used according to time and efforts.The general introduction is not required integrity.For corresponding to The wrong general introduction of protocol layer and DVB-H, with reference to Jaekel, Torsten:DVB-H Data Mapping.052006.– DiBroC。

Synchronicity is derived from the frequency of the bag distribution for assuming probability itself or reality.Here, be respectively compared one it is past short Phase and the meansigma methodss of a past long term time window.If short-term value is fallen below below certain threshold value of Long-term, Assume that receptor loses its synchronicity.Therefore, receptor activation search instruction.

Length field such as 80 and 96 is used as again the instruction of the Data Position of starting point.They give instruction with The new IP bags of a middle start point search in lower transport stream packet 12.Length field is present in MPE（Referring to 68）, IP（Referring to 88）With In UDP levels.Whole directly interdepends with non-segmentation IP bags and is thus redundancy.Therefore this relation can be also used for directly searching Suo Chongqi moving points.

Segmentation skew such as 56 is used together the continuous part to point out to there is IP bags with segmentation IP bags.It is adapted to previous IP bags （Referring to 38a）Skew be used as this continuous instruction.

IP address, such as 98 and 82 can be assigned exclusively to IP flows 86 or MPE sessions 68.Therefore, vice versa, by IP address Distribute to MPE receptors 20.The further available amount for being, constant IP address being kept used in MPE sessions.New ground The unexpected appearance of location is quite rare or or even can not be found in the field of radiobroadcasting, both target and source address Using this relation.

Udp port generally will be limited by the same terms for being used for IP address as above.

Selector such as TOS（COS）、TTL（Life span）, agreement, mark, version it is generally permanent in each session It is fixed constant.Selector wants low address more uniquely to be affected by the condition.Similarly, therefore field header length carried out, so And it is formal in the case of be not selector.

The IP verifications of protocol header（For example, 76）Give the information of the integrity with regard to protocol header.The integrity is closed It is to restart moving point for checking.Can using the relation and by attempting to search for transport stream packet in possible IP package a little.

Multicast address creates connection between the MAC Address and IP destination addresses of MPE headers（Deering,Stephen E.:Host Extensions for IP Multi-casting.Internet Engineering Task Force, 81989.(RFC1112).http.://tools.ietf.org/html/rfc1112）.Therefore, they perform similarly to distribution Length field on several protocol hierarchies.The use of multicast address and IP data broadcastings is conventional.

PID（Referring to 54）For each receptor（20）For be unique and be used to receive complete transmission bag Demultiplexer is used to be allocated to it.Also with the bag of garbled-reception, the field can be checked.If PID is correct for receptor, then Positive evaluation is carried out to this.

Continuous counter is counted in the packet stream of PID.Can help calculate hypothesis probability using such as PID fields.

Signaling table（PSI/SI）Transmission is repeated at periodic or other desired in transmitting stream.Here, the content change of most of tables is relatively fewer. The content of transmission bag of input and the content of received table can be compared to each other so as to the transmission in being discussed Whether bag must be assigned to the corresponding data receptor of signaling.Here, equally can be using tolerance, it is directed to similarity and is examined Look into.

In this document, carry out in this way encapsulation specify by the data stream of some agreements into for via Otherwise another agreement of incompatible data transfer transmission original data stream is used as transmission path.

According to DVB-H（Standard ETSI EN302304;112004.Digital Video Broadcasting (DVB);Transmission System for Handheld Terminals(DVB-H).http:// TilWW.etsi.org/,Specification ETSI TS102585;042008.Digital Video Broadcasting (DVB);System Specifications for Satellite services to Handheld devices(SH) below3GHz.http:Ilwww.etsi.org/）Broadcast system be using for transmitting any media content（Radio, electricity Depending on, data, services, software etc.）Internet protocol IP-based system.Several media contents can be combined into here reality The DVB-H or DVB-SH multiplexing of transmission.This is by according to multi-protocol encapsulation（MPE）Method encapsulation IP traffic it is complete Into.（Standard ETSI EN301192;042008.Digital Video Broadcasting(DVB);DVB specification for data broadcasting.http://www.etsi.Org/) its bag biography in turn based on DVC Defeated (Standard ISO/IEC13818-1;122000.Information technology-Generic coding of moving pictures and associated audio information:Systems.http:// www.iso.org/）.

When using IP data broadcastings, in said method（DVB-H and DVB-SH）In, wrapped in turn again by MPE transmission IP bags containing UDP bags.Here it is possible to IP bags are sent to multicast address.Therefore this pass through（Standard ETSI EN302304;112004.Digital Video Broadcasting(DVB);Transmission System for Handheld Terminals(DVB-H).http://TilWW.etsi.org/,Digital Video Broadcasting Project(DBV)(editor):IP Datacast over DVBH:Content Delivery Protocols(CDP) .Digital Video Broadcasting Project(DVB),122005.(DVB Blubook A101).http:// www.dvb.Org/,Schulzrinne,Henning;Casner,Stephen L.;Federick,Ron,Jacobson,Van: RTP:A Transport Protocol for Real-Time Applications.Internet Engineering Task Force,72003.(RFC3550).http://tools.ietf.org/html/rfc3550）There is provided.

Compared with above-mentioned embodiment, the current enforcement for the demultiplexer of MPEG2 transmitting streams cannot be with fault-tolerant Mode is implementing.Distribution to bag receptor is based only on the PID fields of transmission bag carrying out.Abandon to have and error indicator is set （TEI）Bag.（Standard ISO/IEC13818-1;122000.Information technology–Generic coding of moving pictures and associated audio information:Systems.http:// www.iso.org/）In give the detailed description of transmitting stream.

Using DVB-H and DVB-SH, based on MPE, error protection method MPE-FEC and MPE-IFEC are described.Except by Outside this constant transmission payload data, optionally, error protection information can enter with the help of Systematic error correction code Row sends.Currently, using DVB-H, method MPE-FEC can be with reed-solomon code RS（255,191,64）It is used together, from And allow to improve the error protection in time slot.Using DVBSH, alternatively, MPE-IFEC can be with identical reed-solomon Code is used together.The method allows the error protection happened suddenly across several timeslices.

What is proposed is usual in standard and implementation guide（Digital Video Broadcasting Project(DVB) (editor):DVB-H Implementation Guidelines.Digital Video Broadcasting Project (DVB),052007.(DVB Blluebook A092r2).http.://www.dvb.org/,Specification ETSI TS102584;2010.Digital Video Broadcasting(DVB);DVB-SH Implementation Guidelines Issue2.http://www.dvb.org/）The algorithm for decoding these error protection mechanisms of middle realization Only cover only relevant with network access layer basic function and in order to support resources economy, do not use mistake in goal systems to protect The probability of shield.

Therefore, the transmission stream part of garbled-reception causes all table row covered of marked erroneous.Similarly, biography can be produced Error is sent, it only with is wherein transmitted for cancelling complete output stream part and cancelling again by one of its all row touched Stream is surrounded by pass.

In addition to above-mentioned enforcement variant, also in the case where CRC is tested and failed on the level of transmission stream part, exist For the suggestion of the gradual reconstruction of the receiving data using MPE-FEC（Koppelaar,A.G.C.;Eerenberg,O.; Tolhuizen,L.M.G.M.;Aue,V.:Restoration of IP-datagrams in the DVB-H link layer for TV on mobile.In:Proc.Digest of Technical Papers.International Conference on Consumer Electronics ICCE’06,2006,Pg.409-410）.

Other suggestion（Paavola,J.;Himmanen,H.;Jokela,T.;Poikonen,J.;Ipatov,V.:The Performance Analysis of MPE-FEC Decoding Methods at the DVB-H Link Layer for Efficient IP Packet Retrieval.In:IEEE Transactions on Broadcasting53(2007),3, Pg.263-275.http://dx.doLorg/10.1109/TBC.2007.891694.DOI10.1109/ TBC.2007.891694）Data are transmitted including hierarchical decoding.This is based on Asymptotical Method.During decapsulation, to every Group receives symbol（Transmission stream part, transport stream packet）Whether the symbol that differentiation is included is transmitted in correct or unsafe mode Or do not transmit.

These methods are generally considered from safe floor（MPEG2-TS）Information, such as TEI fields are with to mismark Position carries out description more precisely.

For the transmission bag that assignment error is received, such as in above-mentioned suggestion, using its field continuous counter and PID. This provides a kind of substantially possible but only practical method.Above-mentioned embodiment is thus described a kind of assignment error and receives Bag substantially refining, accurate and the process for thus extending.

Although coupling apparatus describe some aspects, it is apparent that these aspects also illustrate that the description of corresponding method so that side The component of block or device is also regarded as the feature of corresponding method step or method and step.Similarly, associated methods step or with side The aspect of the form description of method step also illustrates that description or the feature of corresponding device of correspondence square or details.Partly or entirely Method and step can pass through（Or utilize）Hardware unit, such as microprocessor, programmable calculator or electronic circuit etc. are performing. In some embodiments, some or several most important method and steps can also be performed by such device.

Require that embodiments of the present invention can be implemented with hardware or software according to some enforcements.Can use and have Be stored thereon it is electrical can read control signal digital storage media（For example, floppy disk, DVD, Blu-ray Disc, CD, ROM, PROM, EPROM, EEPROM or flash memory, hard disk or another magnetically or optically memorizer etc.）To perform embodiment, can with can compile Journey computer system coordinates（Or coordinate with this）, to perform various methods.Therefore, digital storage media can be that computer can Read medium.

Include according to some embodiments of the present invention having electrically can read control signal data medium, electrically readable control Signal processed can coordinate with programmable computer system, to perform method described herein in one.

Generally, embodiments of the present invention may be implemented as the computer program with program code, when the meter When calculation machine program product runs on computers, the program code is operating as in execution method.

The program code for example can be stored in machine-readable carrier.

Other embodiment include be stored in machine-readable carrier for performing method described herein in one Computer program.

In other words, an embodiment of the inventive method is a kind of computer program with program code, the program Code is used in performed in the method described herein when the computer program runs on computers.

Therefore, another embodiment of the inventive method is that a kind of record thereon has for performing method described herein One of computer program data medium（Or digital storage media or computer-readable medium）.

Therefore, another embodiment of the inventive method is to represent the calculating for performing one of method described herein The data flow or a series of signal of machine program.Data flow or a series of signal are for example configurable to connect by data communication, For example it is transmitted by the Internet.

Another embodiment includes processing meanss, and such as computer or PLD are configured or adapted to hold One in row method described herein.

Calculating of another embodiment including in being provided with thereon for performing method described herein The computer of machine program.

Include device or system according to another implementation of the invention, be embodied as performing side described herein The computer program of one of method is sent to receptor.Transmission can pass through electronically or optical mode occurs.Receptor is for example Can be computer, mobile device, storage device or similar device.Device or system for example could be for computer program It is sent to the file server of receptor.

In some embodiments, PLD（For example, field programmable gate array, FPGA）Can be used for holding Part or all of function of row method described herein.In some embodiments, field programmable gate array can with it is micro- Processor cooperates to perform one of method described herein.Generally, in some embodiments, methods described by appoint Meaning hardware unit is performed.It is a commonly available hardware such as specific computer processor of method institute that this is equally possible（CPU） Or hardware, such as ASIC.

Above-mentioned embodiment is merely to illustrate the principle of the present invention.It should be appreciated that arrangement described herein and details are repaiied Change and change and be apparent to those skilled in the art.Therefore, it is intended to only by the scope of appended claims Restriction, rather than by the detail represented by the description to the embodiment in text and explanation limiting.

Abbreviation list

DVB DVBs, for transmitting the family of standards of broadcasted content

DVB-H is used for hand-held DVB, the DVB system standards of terrestrial transmission to mobile terminal apparatus

The DVB of DVB-SH satellite handheld terminals, supports for satellite and mixes（Satellite/terrestrial）Transmit to mobile terminal dress The DVB system standards put

FEC forward error corrections

IP Internet protocols, the network layer protocol of the Internet

IPDC Internet protocol digital broadcastings, transmit main multimedia data stream with the help of Internet protocol

MAC media access controls, are here the addressing level of Ethernet

MPE multi-protocol encapsulations

Standardization error protections of the MPE-FEC based on the use DVB-H of the MPE with reed-solomon FEC

MPE-IFEC MPE inter-bursts FEC, based on reed-solomon FEC（Substitute Raptor codes）MPE use The standardization error protection of DVB-SH, reed-solomon FEC has in the error protection level being distributed in several mutation in addition Intertexture

MPEG2-TS Motion Picture Experts Groups transmitting stream, meets the transmitting stream of ISO/IEC13818-1, i.e. transmission TSP's Sequentially, the also referred to as MPEG-TS multicasts of internet message to several receptors；With broadcast conversely, here, message is only transmitted To the network that the receptor of the message is located

PID PID Packet Identifiers, the address of service on MPEG2-TS levels.TSP on receiver-side is distributed to into addressing in addition The specific receptor of the bag

Specific information/the information on services of PSI/SI programs, using the other data of the signaling of DVB

RS reed-solomon bag codes, system forward error protection code

TEI error indicators, wherein physical transport layer make the bit switch of entry on receiver-side, and representing should Whether TSP is wrong

TOS COSs, the field of IP headers

TSP MPEG-2 transport stream packets

TTL life spans, the field of IP headers

Udp user datagram protocol, for towards a part for the Internet protocol of the data transfer of bag（Transport layer）

Claims (17)

1. the transmission based on bag of a kind of transport stream packet (12) that system forward error-detecting code is provided with for DeMux The device of stream (14), wherein, the transport stream packet is each assigned in multiple data sinks (20) so that in distribution Embedded in by forward error protected code in payload data part to the transport stream packet of identical data sink (20) The data flow (36) of the packet (38) of protection, the data flow (36) is addressed to respective data sink (20), described device It is implemented as

The predetermined biography is indicated for determining according to the wrong predetermined transport stream packet (12) of the system forward error-detecting code Stream bag (12) is sent to have much may being allocated to respective data sink (20) for each in multiple data sinks Probit, and

Based on the probit for the plurality of data sink, the predetermined transport stream packet is distributed to into the plurality of number Selected one according to receptor.

2. device according to claim 1, wherein, for each data sink, connect based on the data are specifically used for The information of described predetermined transport stream packet of device is received performing the determination of the probit, or is connect with being specifically used for the data The mode for receiving device changes to distributing to the another of respective data sink from a transport stream packet of distribution to respective data sink One data stream packets.

3. device according to claim 1, wherein, for each data sink, based on to previous transport stream packet It is time-multiplexed to analyze to perform the determination of the probit.

4. device according to claim 1, wherein, for each data sink, based on the predetermined transport stream packet The information of the payload data part is performing the determination of the probit.

5. device according to claim 1, wherein, for each data sink, it is addressed to the respective data receiver The data flow of device is described effective by the embedded transport stream packet (12) being associated with the respective data sink of segmentation In load data part (48), wherein, what the starting point (60) for having in the packet in the transport stream packet fell into First transport stream packet includes a pointer information (56), and the pointer information (56) each indicates rising for respective packet (38b) The position that point (60) is fallen in the payload data part (48) of first transport stream packet, wherein, described device quilt It is embodied as

For each data sink (20) with invariable for all of data sink (20) or for the respective number According to the invariable mode of receptor (20) or the biography according to previously the allocated to described respective data sink (20) Send stream bag (12) to position the Part I of the predetermined transport stream packet (12),

The predetermined transport stream packet (12) is positioned according to content of the predetermined transport stream packet (12) on the Part I Part II (62), just as content of the predetermined transport stream packet (12) in the Part I be pointer information (56) Sample,

The packet (38) of the respective data sink (20) whether can be allocated to regard to the Part II (62) Part II (62) described in point analysiss are played, and

According to the result of the analysis, it is determined that for the probit of the respective data sink.

6. device according to claim 5, wherein, described device is implemented as being connect for each data in the analysis Receive device inspection：The Part II (62) can be allocated to the starting point of the packet of the respective data sink,

From the last distribution of the transport stream packet (12) to the respective data sink (20), in the Part II (62) The first field (110,82,98) whether at least correspond to the information invariable for the respective data sink (20),

Whether the second field (116) in the Part II (62) includes and the 3rd field (118) in the Part II Predetermined relationship because the predetermined relationship requests assignment to the encapsulation of the packet (38) of the respective data sink Redundancy instruction in data and header data (74), and/or

It is pre- with the 5th field (114) in the Part II whether the 4th field (112) in the Part II includes Determine system forward error-detecting code relation.

7. device according to claim 5, wherein, it is assigned to the respective data sink in the transport stream packet (20) and the second transport stream packet that starting point without in the packet (38) does not fall into does not include pointer letter Breath (56) so that compared with the payload data part (48) of first transport stream packet, second transport stream packet The payload data part (48) increased by lacking the pointer information, described device is implemented as

Finally distribute can extend to from its collection packet and finally distribute to so far for the transport stream packet (12) Each distribute to respective data sink (20) and with Length Indication (80) outside the transport stream packet of data sink (20) Each data sink for being located therein of packet (38), the predetermined transport stream packet is positioned according to Length Indication (80) The Part III (120) of the starting point of the payload data part (48),

The Part III (120) is analyzed with regard to the continuity whether Part III (120) can be identical data packet, and

According to the result of the analysis, it is determined that for the probit of the respective data sink.

8. device according to claim 1, wherein described device are implemented as being determined for per number according to the following According to the probit of receptor

From the transport stream packet to the last distribution of the respective data sink, in the predetermined transport stream packet (12) with Whether machine field at least corresponds to the information invariable for the respective data sink (20),

Including the first random field in the described predetermined transport stream packet of the first predetermined location relationship relative to each other to whether Including the predetermined relationship with respect to mutual content, because the predetermined relationship requests assignment to the respective data receiver Redundancy instruction in the encapsulation of data and header data of the packet of device, and/or

Including the described first random field pair in the described predetermined transport stream packet of the second predetermined location relationship relative to each other Whether there is reservation system forward error detection code relation relative to each other.

9. device according to claim 1, wherein, for each data sink (20), it is addressed at least one data The packet (38) of the data flow (36) of receptor (20) distributes to the respective data receiver by the way that segmentation is embedded In the payload data part (48) of the transport stream packet (12) of device (20), and it is addressed to the respective data and connects Receiving each packet (38) of the data flow (36) of device (20) includes thering is the length for indicating the respective packet (38) Length Indication (80) length field, and wherein, the transport stream packet (12) is including indicating rising for the packet (38) The pointer information (56) of position of the point (60) in the payload data part (48) of the transport stream packet (12), its In, described device is implemented as

For each data sink, based in be already allocated in the transport stream packet of the respective data sink Comparison between the Length Indication of last packet of starting and the pointer information of the predetermined transport stream packet is determining For the probit of the respective data sink.

10. device according to claim 1, wherein, for each data sink (20), distribute to the respective data The packet (38) of the data flow (36) of receptor (20) is each including the finger that at least one data sink is related Show (82,98), wherein, described device is implemented as

One or several potential sites, data receiver are determined in the predetermined transport stream packet (12) for each data sink The related instruction of device may be located in one or several potential sites, and

By by the content of the described predetermined transport stream packet on one or several potential sites and at least from transport stream packet To the related shape of the data sink of the last distribution of respective data sink respective data sink invariable always State value is determining the probit of the respective data sink.

11. devices according to claim 1, described device is implemented as

For each data sink, between being previously already allocated to determine among the transport stream packet of the respective data sink Have a rest the same content of reproduction, and

For each data sink, by the payload data part (48) of relatively more described predetermined transport stream packet (12) The same content reappeared with the interval of content determining the probit of the respective data sink.

12. devices according to claim 1, wherein, for each data sink, it is addressed to the respective data receiver The data flow of device (20) is encapsulated in encapsulating structure and is divided into together with the encapsulation of data (74) of the encapsulating structure point The transport stream packet (12) of respective data sink (20) described in dispensing, wherein, described device is implemented as

For the respective data sink, determine in the transport stream packet (12) several potential sites (116,118), its In, the packet and encapsulation of data for being addressed to the data flow of the respective data sink relative to each other has predetermined pass System, and based on the several potential sites determined by (116, be between the content of predetermined transport stream packet (12) 118) It is no to there is the predetermined relationship to determine the probit for the respective data sink, or

One or several potential sites are determined in the predetermined transport stream packet (12), wherein, it is addressed to the respective data and connects The content for receiving the packet (38) of the data flow (36) of device (20) may be located at described one or several potential position Put, described one or several potential sites include and the transmitting stream for being previously already allocated to the respective data sink (20) The predetermined relationship of the content of the encapsulation of data of in bag (12), and based in one or several potential sites The predetermined transport stream packet be previously already allocated to it is described in the transport stream packet (12) of the respective data sink Determine the probit with the presence or absence of the predetermined relationship between the content of encapsulation of data.

13. devices according to claim 1, wherein, described device is implemented as based on distribution to the data sink (20) identification of the respective inerrancy transport stream packet of identification data receptor (20) indicates that (54) will be according to the system forward The faultless transport stream packet (10) of error-detecting code distributes to recognized data sink.

14. devices according to claim 1, wherein, described device is implemented as when determination is for each data sink The probit when, it is considered to the dividing frequency of the shorter term and/or longer term of past transport stream packet (12).

15. devices according to claim 1, wherein, described device is implemented as based on for the plurality of data receiver The predetermined transport stream packet (12) is distributed to the data sink with maximum probability value by the probit of device (20).

A kind of 16. systems of the data flow that tentation data receptor is addressed to for decoding, the data flow is from each setting There is the transmitting stream based on bag of the transport stream packet of system forward error-detecting code, the system includes：

According to device in any one of the preceding claims wherein；And

Decoder, for the institute that decoding is embedded in the transport stream packet for distributing to the tentation data receptor by described device State the data flow in payload portions.

A kind of biography based on bag of 17. transport stream packets (12) that system forward error-detecting code is each provided with for DeMux The method for sending stream (14), wherein, the transport stream packet is each assigned in multiple data sinks (20) so that Embedded in by forward error in the payload data part of the transport stream packet for distributing to identical data sink (20) The data flow (36) of the packet (38) of protected code protection, the data flow is addressed to respective data sink (20), the side Method includes

For according to the system forward error-detecting code being that the predetermined transport stream packet (12) of mistake is determined for the plurality of The instruction predetermined transport stream packet (12) of each in data sink has much may be distributed to the respective data and connect The probit of device (20) is received, and

The probit based on the plurality of data sink distributes to the predetermined transport stream packet selected described many One in individual data sink.